In #93, we implement StringBuilder/StringBuffer serialization by converting to/from java.lang.String, which have some copy cost. A better solution is tackle inner data structure to avoid this copy.

I think that most experienced Java developers are aware of many of the many characteristics of the Java String that make it a little different than other objects. One particular nuance of the Java ...

Though Java already has a character type and char keyword to represent and manipulate characters, the language also requires a Character class for two reasons: Character c1 = new Character ('A'); ...

Objective: To understand the mutable nature of the StringBuilder class and learn how to use its essential methods for efficient string manipulation.